The locations and sizes of NH3 masers in W51

Details The locations and sizes of NH3 masers in W51 The locations and sizes of NH3 masers in W51

Mar 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...229l...1w&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 229, no. 1, March 1990, p. L1-L4.

Astronomy and Astrophysics

Astrophysics

10

Ammonia, Astronomical Spectroscopy, Interstellar Masers, Brightness Temperature, Emission Spectra, Maser Pumping, Temperature Gradients, Very Large Array (Vla)

Scientific paper

Interferometric observations of the (J,K) = (9,8) inversion line of para-NH3 from W51 show that the source size is smaller than 1.5 arcsec. The peak brightness temperature corrected for source size is above 1600 K. Since this temperature exceeds the Doppler width of the (9,8) line, the emission is caused by maser action. The (9,8) maser is located SW of W51 - IRS2 (W51 d) at the edge of the continuum source. No time variability has been observed during 1985 - 1989.

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